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Elements

BBC World Service

A close look at chemical elements, the basic building blocks of the universe. Where do we get them, what do we use them for and how do they fit into our economy?

Archived from iTunes at https://itunes.apple.com/us/podcast/elements/id820289785. Items in this collection are restricted.

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Elements
Sep 28, 2016 BBC World Service
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In the final programme in our Elements series, Justin Rowlatt looks at the rarest and oddest members of the periodic table. Selenium, bismuth, molybdenum, antimony, rhenium, hafnium, zirconium, tellurium, thallium, barium. What are they? And what are they used for? Minor metals merchant Anthony Lipmann explains how he made a fortune tracking down a stockpile of one toxic element sufficient to kill millions of people - and sold it to Japanese camera manufacturers. We set chemistry professor...
Elements
Sep 21, 2016 BBC World Service
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Why do we value this practically useless metal so highly? And does it bring out the worst in human nature? In a second look at this most coveted of metals, Justin Rowlatt hears both sides of the age-old argument. Swiss investor and gold enthusiast Marc Faber explains why he keeps gold bars tucked away at his home in rural Thailand. Meanwhile financial advisor and Big Picture blogger Barry Ritholtz teases goldbugs for succumbing to what he considers their very human irrational tendencies. Plus,...
Elements
Sep 16, 2016 BBC World Service
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This radioactive metal holds the promise of thousands of years of energy for the world. But is it really any cleaner or safer than traditional uranium-based nuclear power? Chemistry Professor Andrea Sella of University College London takes the helm, as he speaks to no less than three nuclear physicists in his quest to discover whether thorium will deliver that godlike bolt of electricity, or just remain a nebulous dream. Prof Bob Cywinski of the University of Sheffield is a fan, whereas Dr...
Elements
Sep 7, 2016 BBC World Service
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Six extremely rare metals that clean your car exhaust and turbocharge industrial chemistry, but which are also the focus of a violent power struggle in South Africa. Presenter Laurence Knight heads to Johnson Matthey, a company that pioneered the car catalytic converter in the 1970s, to find out how they work and to watch the kind of emissions test that Volkswagen cheated. Andrea Sella of University College London makes a piece of one of these precious metals pop, and explains why platinum...
Elements
Aug 31, 2016 BBC World Service
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The macabre poison we know from crime novels and history books has some surprising modern uses. Justin Rowlatt travels the Subcontinent - first to India's Forest Research Institute in the Himalayas where Sadhna Tripathi explains why the chemical element ends up in telegraph polls. We then head to Bangladesh, scene of the "largest mass poisoning in history". Justin speaks to Dr Quazi Quamruzzaman who helped first uncover it, and to Richard Pearshouse of Human Rights Watch, who says the...
Elements
Aug 24, 2016 BBC World Service
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The shiniest and showiest of metals is still mainly used in silverware. But it also has some surprisingly modern applications. Justin Rowlatt heads deep under the city streets to the sparkling London Silver Vaults to talk tableware and frivolities - the more traditional uses of silver. We also hear from Dr Alan Lansdown of Imperial College, a champion of silver in medicine (except when it turns you blue), and from Prof Alan Dalton about the future role of silver in flexible touchscreens....
Elements
Aug 17, 2016 BBC World Service
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Why does iodine deficiency still blight children in developing countries like India? Justin Rowlatt travels to Dehradun in the Himalayas with world expert Chandrakant Pandav to diagnose schoolchildren still suffering from the throat swelling called goitre, and from the permanent mental retardation known as cretinism. Justin challenges Indian government officials to explain why, 50 years after India first introduced its salt iodisation programme, this easily solvable problem still persists....
Elements
May 31, 2016 BBC World Service
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Could we finally be about to crack this source of potentially unlimited clean energy - thanks in part to a plethora of private sector tech startups? Laurence Knight travels to one such company, Tokamak Energy in the UK, to hear from plasma physicist Melanie Windridge. Meanwhile the BBC's David Willis reports on the string of secretive new fusion initiatives along the Pacific Coast, and the Silicon Valley money backing them. Plus, could fusion energy open the way to the economic abundance and...
Elements
May 25, 2016 BBC World Service
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This toxic metal is slowly being phased out of our lives. But as presenter Justin Rowlatt discovers, while nickel-cadmium batteries may have disappeared from our gadgets, they still help to keep planes up in the air. Chemistry professor Andrea Sella tells the story of this colourful yet poisonous element, while metals consultant Dominic Boyle says even if we stop using it all together, the stuff is still piling up. Justin visits the offices of SES Batteries in the Indian military town of Ambala...
Elements
May 18, 2016 BBC World Service
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Potash plumps up fruit, vegetables and grains, and the potassium it contains is an essential nutrient. Yet India is completely dependent on imports of this critical fertiliser to feed its population. Presenter Justin Rowlatt visits a farm on the Ganges plains to see how this mineral is used, and speaks to the head of the national importer Indian Potash Ltd about their efforts to promote its use by farmers. We also hear from Paul Burnside, analyst at CRU Group, how a bust-up in Belarus has...
Elements
May 10, 2016 BBC World Service
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Is the dream of a hydrogen-fuelled zero-carbon economy achievable? Presenters Justin Rowlatt and Laurence Knight ask where the hydrogen will come from and how we will store it. Professor Andrea Sella of University College London blows up a hydrogen balloon, while Professor James Durrant of Imperial College explains what an artificial leaf is. In India, Alok Sharma of the Indian Oil Company gives a tour of their hydrogen refuelling station and fuel cell research centre. And Ned Stetson of the US...
Elements
May 4, 2016 BBC World Service
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The metal that brings shelter and good health to India's poorest. Presenter Laurence Knight travels to a bustling Delhi where Rahul Sharma of the International Zinc Association explains how this self-sacrificing chemical element fights off the ravages of the city smog, while Dr HP Sachdev runs us through its medical benefits. In Rajasthan Sunil Duggal, chief executive of Hindustan Zinc Ltd, explains how mining operations such as at the gigantic Rampura Agucha will help feed India's coming...
Elements
Apr 27, 2016 BBC World Service
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As climate change threatens to play havoc with the rain, could we instead draw our water directly from the ocean? In his second gulp of H2O, presenter Justin Rowlatt hears from climatologist Raymond Pierrehumbert about how global warming is causing drastic but often unpredictable disruption to our natural supplies of freshwater. Yet as Israel enters its third year of dought, few of the country's citizens are aware of any water shortages. The BBC's Shira Gemer reports on the technological...
Elements
Apr 20, 2016 BBC World Service
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Northwest India is fast running out of groundwater. As much of the world faces growing water scarcity, will mass migration and water conflicts become inevitable? Do we take water for granted at our peril? Presenter Justin Rowlatt hears from chemistry professor Andrea Sella of University College London why water is essential for life, and why it is far weirder than we realise. Laurence Knight reports from a parched Rajasthan on what can be done to stop farmers there from pumping the ground dry....
Elements
Mar 23, 2016 BBC World Service
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Neon, argon, krypton and xenon: Laurence Knight investigates their uses, from the blinding light of the arc welder's torch to the dying trade of the neon sign-making. Professor Andrea Sella explains how an alumnus of his home University College London - Scottish chemist Sir William Ramsay - uncovered an entire column of the periodic table containing all of these unreactive gases. Neon sign-maker Graham Cox shows how to bring colour and light to the dingiest of corners, while neon artist Marcus...
Elements
Mar 16, 2016 BBC World Service
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Nanotech, virtual reality, Moore's Law - we look at germanium, the substance that could oust the silicon from Silicon Valley, and one day help computers supercede your brain. IBM's head of innovation, Bernie Meyerson, showcases the company's new prototype 7nm germanium-silicon chip - containing the tiniest transistors yet at just 35 atoms across. Presenter Laurence Knight heads to Oxford to scrutinise the equally tiny images made by startup Bodle Technologies out of wonder material GST. And he...
Elements
Mar 9, 2016 BBC World Service
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Radium, polonium and radon may be names to make your hair stand on end, but are they actually useful for anything? And is our fear of them overbaked? Laurence Knight gets the chemistry rundown from Prof Andrea Sella of University College London at a hospital that used to treat cancer with radiation. Al Conklin of the Washington State Department of Health explains how we are still dealing with the world's early Twentieth Century craze for all things radioactive. Edwin Lane reports from Finland...
Elements
Mar 2, 2016 BBC World Service
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Is coltan - the notorious conflict mineral from which these two metals are derived - still being smuggled from DR Congo into Rwanda, to evade taxes and sourcing controls? Laurence Knight investigates the hi-tech roles to which these two chemical elements are put in gadgets and telecommunications. He also discusses the bloody history behind the mining of their ore in the heart of Africa with Sophia Pickles of human rights organisation Global Witness. And the BBC challenges the Rwandan...
Elements
Oct 22, 2015 BBC World Service
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Rare and toxic, beryllium can do serious damage to your lungs. Presenter Laurence Knight explores whether and how we can make use of this metal safely. Prof Andrea Sella of University College London explains why beryllium's surprising scarcity is the very reason it can be so harmful to the body. Gianna Palmer reports from the Hanford nuclear site in Washington State on this chemical element's intimate and poisonous history in the US nuclear weapons programme. And we hear from IBC Advanced...
Elements
Sep 30, 2015 BBC World Service
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This metal played a part in the worst car crash in history, the 1955 Le Mans disaster, helping to make the resulting inferno explosively dangerous. Yet despite its fiery reputation, and its proneness to corrosion, magnesium has regained its historic role in making planes and cars lighter and more efficient. Presenter Laurence Knight visits Magnesium Elektron, the company behind the alloy used in the ill-fated Le Mans car, to find out how a new breed of alloys has exorcised the demon's in this...
Elements
Sep 16, 2015 BBC World Service
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Titanium is the magic metal that made possible the mass production of plastics and paints, as well as buildings that clean both themselves and the air around them. Presenter Laurence Knight heads to the Ineos oil refinery in Grangemouth, Scotland, to see how just a smidge of a titanium-based catalyst transforms a type of natural gas into the stuff of food packaging, bottles and car bumpers. He hears from Prof Andrea Sella why most of us spend our lives surrounded by titanium without even...
Elements
Aug 19, 2015 BBC World Service
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These powerful chemicals are essential to obtain the minerals that build our world, the fertilisers that feed the planet, and the fuels that propel our vehicles - as presenter Laurence Knight discovers on a trip to the Ineos Grangemouth oil refinery in Scotland. But while most traditional acids are based on the power of hydrogen ions, Prof Andrea Sella of University College London explains that many modern industrial "acids" do not, and come in startlingly unexpected forms such as...
Elements
Aug 12, 2015 BBC World Service
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Why is oxygen essential to steelmaking, how do you extract it from the air, and can you inhale too much of it? Answering these questions leaves presenter Justin Rowlatt almost breathless. Prof Andrea Sella demonstrates the convenience and power of this bulk chemical, whilst Laurence Knight heads to BOC's air separation unit in Fawley to see how it is mass produced. Meanwhile Justin climbs a mountain, scuba dives and pedals like mad on an exercise bike inside a low oxygen chamber. But it's all...
Elements
Aug 5, 2015 BBC World Service
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Stronger and more durable than steel, this glamorous metal crops up in sportscars, hip replacements and jewellery - but a new chemical process hopes one day to make it as common as steel. Prof Andrea Sella explains why this relatively widespread chemical element is so difficult to extract from its ore. Presenter Laurence Knight then heads to Yorkshire, where metallurgy pioneers Metalysis are trying to commercialise a novel way of doing just that - the so-called FFC Process. We also visit Epsom...
Elements
Jul 29, 2015 BBC World Service
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The “element of life” also makes the air that we breathe a perilous and costly atmosphere in which to operate. Prof Andrea Sella of University College London provides presenter Justin Rowlatt with a characteristically striking argument for why oxygen is so “incredibly dangerous”, and how its advent turned Planet Earth into a snowball. Pawanexh Kohli, in charge of India’s national cold chain strategy, explains over a cup of chai why the oxygen needs of fresh vegetables and fresh meat...
Elements
Jul 22, 2015 BBC World Service
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Cobalt, the metal in magnets and phone batteries, is synonymous with the colour blue. But what exactly are magnets, how do they work and where are they used? And is some of the cobalt being mined by children? Presenter Laurence Knight hears from chemistry professor Andrea Sella of University College London why a permanent magnet is like a flock of birds, and he travels to Arnold Magnetics near Sheffield where manager Martin Satyr explains how magnets are used in everything from recovering the...
Elements
Jun 25, 2015 BBC World Service
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Copper has long been the metal of electricity generators and wiring. But presenter Justin Rowlatt asks whether new technologies herald the death of the old-fashioned electricity grid. Prof Andrea Sella of University College London explains the special properties of element 29 of the periodic table that mean that half of the world's mined copper is used to conduct electricity. Justin travels to the rapidly growing Indian city of Gurgaon to ask Jasmeet Khurana of solar consultancy Bridge to India...
Elements
Jun 17, 2015 BBC World Service
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Copper is the distinctive red metal in pots, pans and water pipes, and also plays a central role in whisky distillation. Presenter Laurence Knight and chemistry guru Professor Andrea Sella of University College London travel to the Abercrombie copperworks in Scotland to see the art of whisky still-making first-hand. Also in the programme, Gideon Long reports from Chile on why the source of one-third of the world's copper supply has not succumbed to the "resources curse". And Bill...
Elements
Jun 11, 2015 BBC World Service
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Boron is the mineral from the Wild West that stops glass from shattering and stops bullets in their tracks. Presenter Laurence Knight visits the Dixon Glass works to see why borosilicate glass is perfect for making chemistry equipment and much of the glassware we use in our day-to-day lives. Professor Andrea Sella demonstrates how this element puts the flub into flubber. Colin Roberson, founder of body armour firm Advanced Defence Materials, explains why being shot is like standing at the...
Elements
Jun 3, 2015 BBC World Service
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LED lighting, solar power and lasers are just some of the electronics revolutionised by two obscure chemical elements - gallium and indium. Laurence Knight hears from Mike Simpson of Philips why we will only need to replace our lightbulbs once every two decades, and travels to Sheffield University where research centre head Jon Heffernan explains what on earth III-V materials are and why making an LED is like baking a pizza. Meanwhile chemistry stalwart Prof Andrea Sella of UCL demonstrates...
Elements
Apr 1, 2015 BBC World Service
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Iron is the chemical element at the heart of steel, and by extension of industrialisation, so what does the collapse in iron ore prices say about the economic progress of China and India? Is the steel-making party over, or is a new one just about to begin? And will humanity, one day, stop digging this element up altogether? (Photo: Skyscraper under construction in Pudong, Shanghai, Credit: Getty Images)
Elements
Mar 25, 2015 BBC World Service
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The two key ingredients that enabled the mass production of steel. We travel to Sheffield - the birthplace of modern steelmaking - to get up close to the technological mid-wife, a Bessemer converter. Plus we visit the modern Forgemasters steelworks, to get a taste of just how hard it is to produce unbreakable parts for nuclear power stations and oil rigs. (Photo: Steel component at Forgemasters Steelworks, Credit: Laurence Knight/BBC)
Elements
Mar 18, 2015 BBC World Service
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In the first of three programmes about iron, Justin Rowlatt explores two moments in industrial history that transformed this most abundant of metal elements into the key material out of which modern life is constructed. And they both took place right here in the British Isles.
Elements
Mar 11, 2015 BBC World Service
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Technetium is essential for medical imaging, yet supplies of this short-lived manmade element are far from guaranteed. We see a technetium scan in progress and a cow being milked, and hear the yarn of the 70-year chemistry wild goose chase sparked by this mysterious radioactive metal.
Elements
Mar 4, 2015 BBC World Service
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Itself a ferocious yellow gas, fluorine is also the key building block for a string of other gases that pose a threat to mankind - from the ozone-depleting CFCs to potent greenhouse gases. We track fluorine from the mine to its incredible array of final uses. And we find out why an exploding Mercedes car has caused a trans-Atlantic chemistry tiff.
Elements
Feb 26, 2015 BBC World Service
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Chromium is the metal of modernity - spawning icons from the Chrysler Building to the Harley Davidson. This colourful element is the key ingredient in stainless steel and leather. But the shiny metal also has a dark side - one brought to public attention by Erin Brockovich.
Elements
Feb 18, 2015 BBC World Service
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Nickel is the metal that made the jet age possible, not to mention margarine and bicycle sprockets. We visit Rolls Royce to discover the incredible materials science that this chemical element and its super-alloys have driven.
Elements
Oct 8, 2014 BBC World Service
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Uranium is the fuel for nuclear power stations, which generate carbon-free electricity, but also radioactive waste that lasts a millennium. In the latest in our series looking at the world economy from the perspective of the elements of the periodic table, Justin Rowlatt travels to Sizewell in Suffolk, in a taxi driven by a former uranium prospector. He is given a tour of the operational power station, Sizewell B, which generates 3% of the UK's electricity, by EDF's head of safety Colin Tucker,...
Elements
Oct 1, 2014 BBC World Service
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Lead is the sweetest of poisons, blamed for everything from mad Roman emperors to modern-day crime waves. Yet a lead-acid battery is still what gets your car going in the morning. So have we finally learnt how to handle this heavyweight element? Justin Rowlatt travels to arts shop Cornelissen in London's Bloomsbury to find out why they have stopped stocking lead paints, and hears from professor Andrea Sella of University College London about the unique properties that have made this metal so...
Elements
Sep 24, 2014 BBC World Service
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The atomic clock runs on caesium, and has redefined the very meaning of time. But it has also introduced a bug into timekeeping that affects everything from computerised financial markets to electricity grids, and satellite navigation to the Greenwich Meridian. Justin Rowlatt travels to the birthplace of modern time, the National Physical Laboratory in Teddington, England, to speak to Krzysztof Szymaniec, the keeper of the 'Caesium Fountain', and Leon Lobo, the man charged with disseminating...
Elements
Sep 17, 2014 BBC World Service
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Bromine puts out fires - both in the home and in the heart. But despite its reputation as an anti-aphrodisiac, this chemical element's biggest use is in fire retardants, found in everything from your sofa to your radio. But do these bromine-based chemicals pose a risk to your health? Presenter Justin Rowlatt hears from chemistry professor Andrea Sella of University College London, about his own childhood encounter with this noxious red liquid. Justin speaks to chemicals industry analyst Laura...
Elements
Sep 11, 2014 BBC World Service
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Plutonium is one of a family of highly radioactive "synthetic" elements cooked up in nuclear reactors. But does it and its kin have any practical application besides the atom bomb? We travel to plutonium's sunny birthplace to find out. (Picture: Nuclear test in Nevada in 1953; Credit: Stocktrek Images/Thinkstock)
Elements
Aug 18, 2014 BBC World Service
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Already responsible for the IT revolution, could silicon be about to pull off an energy revolution too? We hear from pioneer John Schaeffer about solar power's hippy roots, and Richard Swanson of Sun Power explains why it may be on course to become the world's dominant source of energy. Meanwhile Republican stalwart Barry Goldwater Jr. makes a surprising political bedfellow for solar's traditionally green supporters. (Picture: Californian house covered in solar panels; Credit: Sunrun)
Elements
Jul 31, 2014 BBC World Service
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Silicon is synonymous with the computer revolution. We travel to its eponymous birthplace - Silicon Valley in California - to ask chip pioneers Intel why this chemical element has supported a billion-fold increase in computing power, and whether the exponential improvement implied by "Moore's Law" has reached the end of the line. (Picture: Intel 22 nanometre transistor; Credit: Intel)
Elements
Jul 30, 2014 BBC World Service
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Sulphur is in abundant supply thanks to its extraction from sour oil and gas, in order to prevent acid rain pollution. But does the world face a glut of this devilish chemical element, famed for its colour and odour? And if so, what uses can it be put to? Justin Rowlatt has his hair cut as professor Andrea Sella of University College London, demonstrates sulphur's surprisingly plastic - and acrid - qualities. He travels to the leafy London suburb of Twickenham to find out about Joshua Ward, the...
Elements
Jul 29, 2014 BBC World Service
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Tungsten is one of the hardest, heaviest and highest melting metals, used in everything from bulbs to bullets, x-rays to drill bits. Justin Rowlatt hears from the perennial Professor Andrea Sella of University College London about the properties of what is one of the densest of elements. We get a tour of the SGS Carbide tool factory with managing director Alan Pearce, and we consider the market value of this very useful element with Mark Seddon, head of consultancy firm Tungsten Market...
Elements
Jul 28, 2014 BBC World Service
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Traditionally used as a magic ingredient to produce tougher, more wear-resistant steels, vanadium has discovered a surprising new calling in life. Could this neglected metal, and the gigantic batteries it produces, provide the perfect counterpart for temperamental wind and solar energy sources? And could a future source of the mineral be harvested from the bottom of the sea? (Picture: Chrome vanadium adjustable spanners and bolts; Credit: runrobirun/Thinkstock)
Elements
Jul 27, 2014 BBC World Service
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Nitrogen is a crucial ingredient in fertilisers. And thanks to a pair of clever Germans, the Haber-Bosch process of fixing nitrogen from the air ensures that the planet's burgeoning population can still feed itself. But does it also threaten the planet with an environmental disaster more calamitous than climate change? And could the solution be provided by genetic engineers? (Picture: Legume root nodules; Credit: Ninjatacoshell/Wikicommons)
Elements
Jul 26, 2014 BBC World Service
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Some 78% of the Earth's atmosphere is nitrogen. Yet this seemingly inert gas is the key component of bombs and explosives. It has brought life and death on an epic scale since mankind first unlocked its potential a century ago. And it has brought tragedy to the lives of the scientists who mastered its potential. (Picture: Early Bosch ammonia reactor in Ludwigshafen; Credit: BASF)
Elements
Jul 25, 2014 BBC World Service
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Polymers – or plastics – are enduring, cheap, mouldable and versatile. Yet their very durability mean they litter our landscapes. And their main raw material - crude oil - will not last forever. So could the future be to use nature - with a little tweaking from man - to draw plastics from the atmosphere, and return them at the end of life?
Elements
Jul 24, 2014 BBC World Service
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What links soap, paper, heart disease and murder? Sodium. In the latest in our series of programmes looking at the world economy from the perspective of the elements of the periodic table, Justin Rowlatt returns to the chlor-alkali plant of Industrial Chemicals Ltd to discover from chemistry professor Andrea Sella how sodium is ripped from common table salt, and how it provides the grist for the global chemicals industry. One of its biggest uses is in the Kraft process, the most common way of...
Elements
Jul 23, 2014 BBC World Service
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Chlorine is more than just a chemical used in swimming pools. This poisonous green gas is the great enabling element of the chemicals industry, used in creating your clothes, computer chips, medicines and flooring. Justin Rowlatt travels to Thurrock to tour the chlor-alkali plant of Industrial Chemicals Ltd with chief chemist David Compton, as he discovers the brutal process of extracting chlorine from the most mundane of raw materials - table salt. We hear from regular contributor Professor...
Elements
Jul 22, 2014 BBC World Service
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Lithium is the electro-chemical element - big in batteries and bipolar disorder. Over two decades it has shot from obscurity to become almost synonymous with the way we power our gadgets. Presenter Justin Rowlatt hears from chemistry powerhouse professor Andrea Sella of University College London about what makes lithium so light and energetic. We hear from Gideon Long in Chile, who visits the world's richest source of lithium in the Atacama Desert, and about how neighbouring Bolivia believes it...
Elements
Jul 21, 2014 BBC World Service
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Neither rare nor earths, these 17 elements are nonetheless difficult and unpleasant to mine and refine. Chemically near-identical, these metals have unique magnetic and optical properties, making them essential in modern technology from fibre optics to wind turbines. So should we worry about China's stranglehold over their supply? (Picture: 20 euro note glows under an ultraviolet light; Credit: Frans Dekkers/Thinkstock)
Elements
Jul 20, 2014 BBC World Service
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Diamonds are not forever. They can be burned, and these days they can be mass-produced in a factory. So can your jeweller tell the difference between a natural and chemically identical "fake"? And can the new breed of cheap, pure, manmade rocks be put to novel, hi-tech uses, beyond drilling rocks and adorning the wealthy? (Picture: Synthetic diamond lens; Credit: Element Six)
Elements
Jul 19, 2014 BBC World Service
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Calcium is the great structural element. It is the basis of much of the great architecture in nature as well as many of the incredible structures made by man. Presenter Justin Rowlatt hears from chemistry supremo Andrea Sella at the Royal Institution in London, where calcium was first isolated two centuries ago. He visits the obscure birthplace of the biggest modern-day use of calcium - cement - and sees that use in action at London's giant Crossrail construction project. And, if that weren't...
Elements
Jul 18, 2014 BBC World Service
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Tin may seem old-fashioned, but it plays some surprisingly important roles in the modern economy. Presenter Justin Rowlatt meets our favourite chemist Andrea Sella of UCL at Pewters' Hall in London to discover the unique properties of the metal that sparked the Bronze Age. He discovers the metal's role in plastics and electronics, and visits the giant Pilkington glass factory to find out how tin revolutionised the glass-making industry. And he meets two very venerable tin chemists, Alwyn Davies...
Elements
Jul 17, 2014 BBC World Service
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We all know carbon's role in global warming, but could element 6 also provide some solutions? Carbon fibre composites are making planes more fuel efficient, as Airbus explains. And wonder-material graphene has opened up a new world of applications, from energy storage to fuel filtration, as we discover at Manchester University.
Elements
Jul 16, 2014 BBC World Service
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Carbon is a great energy store – in plants and animals, but also as hydrocarbons – coal, oil and natural gas. From the Industrial Revolution onwards, burning these fossil fuels has released vast quantities of carbon dioxide into the air, affecting our climate and oceans. So can we ever get by without carbon-based energy?
Elements
Jul 15, 2014 BBC World Service
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Heavy and chemically inert, why is gold, of all the elements of the periodic table, so highly valued by mankind? Does it even provide a sound basis for modern currencies? What is it actually useful for? And, given its value, what extraordinary lengths will people go to, to recover every tiny scrap of it?
Elements
Jul 14, 2014 BBC World Service
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Mercury is beautiful, yet deadly poisonous. Known as quicksilver, the Minamata international treaty aims to phase its use out completely. But how will the ban on element 80 affect artisanal gold miners? Or coal-fired power stations? And why does so much of this liquid metal end up in tuna and swordfish? (Picture: Ghanaian artisanal miner holds mercury in his hand; Credit: Matt Davies/BBC)
Elements
Jul 13, 2014 BBC World Service
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Light, strong and flexible, aluminium is used in drinks cans, window frames, aircraft and packaging. Ubiqitous today, why was it valued more highly than gold 150 years ago? Is it better to recycle this metal, or spend vast amounts of energy creating more of it from scratch? And why is Jaguar Landrover teaching robots to rivet?
Elements
Jul 12, 2014 BBC World Service
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The second most abundant element in the universe, helium is rare on Earth. In liquid form it is used as a coolant in super conducting magnets in MRI scanners – so should this rare element be used in something as frivolous as party balloons? And what happens to the helium when that balloon inevitably escapes the clutch of a small child? (Picture: US National Helium Reserve; Credit: Jonny Dymond/BBC)
Elements
Jul 11, 2014 BBC World Service
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Phosphorus is essential for life. Our crops would not grow without phosphate fertiliser. So should we worry that we may be frittering the stuff away? Or that most of the world's remaining reserves are controlled by one country? Or that our phosphorus-rich waste may be asphyxiating fish? The possible solution to these problems stinks.
Elements
Feb 8, 2014 BBC World Service
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The periodic table provides an entirely new perspective on how the global economy works, as we discover in the first part of a new series about the chemical elements. A mining engineer working with Rio Tinto explains the geological processes that took millions of years to create the useful concentrations of these fundamental building blocks, and the often brutal process of extracting them. We hear about a project to dissect mobile phones in order to highlight the disturbing stories behind some...